This paper aims at an assessing of a supply chain performance by adopting the Supply Chain Operation Reference (SCOR) Model. The supply chain activities are divided into five core processes, i.e. plan, source, make, delivery and return. Each level of the SCOR model is weighted using Fuzzy Analytical Hierarchy Process (FAHP). The mapping of SCOR Model consists of 5 core processes at 1st level, 21 performance matrices at 2nd level, and 28 Key Performance Indicator (KPI) at 3th level. The result shows that the supply chain performance is 68,231. Referring to the performance indicators, the performance achieved by the supply chain at this time is in the average category. Proposed improvement strategies are designed based on lean supply chain principles, through the implementation of Gemba Kaizen which consists of 17 proposed strategies.